Pump runner assembly



Aug. 27, 1940.

Q. JACOBSEN PUMP RUNNER ASSEMBLY Original Filed April 14, 1938 //v l/EA/TOE Ora rzm/ dnc 0a .szrv

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Reissued Aug. 27, 1940 PUMP RUNNER. ASSEMBLY,

- O'yste'inJacobsen, Dayton, Ohio, assignor to The York 7 DurlronCompany, Inc., a corporation of New Original No. 2,143,484, datedJanuary 10, 1939,

Serial No. 201,994, April 14, 1938. Application for reissue April 6,1939, Serial No. 266,433

, 13 Claims.

I The invention-relates'to a. pump runner assembly 'of the typerequiring corrosion-resisting material asthe composition of the runnerproper and sleeve whichIcontact with the liquid handled by the pump anda. drive shaft of stronger, tougher material, The invention has for itsobject the provision of improved means for locking the runne1 ;toitsjshaft, so that in case the pump is started up backwards, the runnerwill not unsCrew-its'ellf-from the shaft. a

a another object of the invention is to dissipate 'the""heat containedin the sleeve which surrounds-thejdrive shaft and bears against thestuffing box.

; One embodiment of the invention is illustrated in the accompanyingdrawing, wherein:

a Figure 1"is a longitudinal section through th assembly. v 'Figure "2is a section on the line li -II of Figure 1, before applying the lockingmetal. H Figure 3 is a detail view of the shaft.

Referring to the drawing, 4 is the pump runner of corrosion resistingmetal, such as high silicairon', which is not subject to machining otherthan grinding, and 5 is a sleeve or shroud of similar materialsurrounding and protecting the drive shaft 6 of machinable metal, suchas steel or, qthermetal commonly used in shafting. ,In' the pumpinstallation, the stufilng box of the pump casing fits around the sleevein thecustomary, manner as shown for example in my ntent-Na; 2,049,204,dated July 28, 1936. i I A cavity is provided in the hub I of therunnerwhich carries a filler B of machinable metal, such asibronze,white metal or the like positioned by a casting operation. An opening isprovided in the 'filler and threaded to receive the threaded {end '9 ofthe drive shaft. An annular recess l is provide'd at the end of thefiller, and a set of keyways H are milled in the end of the fillercommunicating at their outer ends with the recess I'll. In the presentinstance, there are five keyways, as indicated in Figure 2, but thisnum- "b'e r m'aybe varied, depending on the diameter er the shaft 6. Ashoulder is provided on the shaft'at' [2,- against which the lefthandend of the sleeve'5 engages, when the shaft is screwed intoposition,-.thus placing the sleeve in compression between the shoulderand theend of the huh I and preventing-any rotary movement of the.sleeve relative. to therunner and shaft.

The sleeve, -fits around the shaft relatively closely at the endportions l3, 13 (Fig. 1), but intermediate-.such portions, a substantialclearance spaceis provided to permit of the pouring of the lockingmaterial later described. The part of the shaft opposite the annularrecess IU-and keyways ll, is provided with a pair of keyways l4, it,which keyways also extend past the portions l3, I3 of the sleeve."' Apair of similar keyways l5, l are provided in the shaft 6 at theshoulder 12, which keyways extend past the portions l3, I3fofthesleeve'which lie next to the shoulder. Y v The locking ofthe shaftagainst unscrewing is accomplished by flowing fusible metal lGjsuch aslead or Babbitt through the space between the sleeve and the shaft untilthe annular recess l0 and-the keyways H leading th'erefrOm are filled.It will be noted that regardless of the rotary position of the shaftwith respect to the filler a', the, two keyways I, I4 will alwaysregister with a plurality of keyways ill, thus insuring a filling ofsuch grooves by the locking metal and an inter lock against subsequentunscrewing of the shaft. It is apparent that inasmuch as the-shaftcannot become unscrewed, the locking metal also serves to prevent antmovement between the sleeve'i and the runner 4. v

In pouring the locking metal I6,-the' assembly is held with the shaft invertical'position and is heated'to insure against "freezing of the metalduring the pouring operation. One of-thekeyways I5 adjacent the shoulder12 isutilized as the inlet in pouring, a suitable funnel gate beingapplied to facilitate the operation. The metal, thus supplied, flowsdownward between the shaft and sleeve and fills'the annular recess "landall of the k'yways ll.'-'I'he keyway 15 at the shoulder l2, which liesin opposition to the one through which pouring occurs, merelyacts a's'anescape passage for-air or gases during the pouring operation, thusfacilitating the free inflow of the metal. When the assembly cools, thelocking metal solidifies, and any unscrewing action of the runnerrelative to the shaft, is positively prevented, due'tothe locking effectof the metal in the two sets of keywa'ys II and UH-the one lying in thefiller and the other in the shaft. The arrangement also; gives assurancethat the keyways II, which are overlapped by the keyway It, will befilled with the fusible metal, since the combined depth ofthe twokeyways permits a much more ready flow of the fused metal than is thecase with those of the keyways vll whose sole source of supply; is theannular recess I0. These latter'keyways constitute narrow pockets closedat their inner ends, and into which it is somewhat .diflicult to flowmolten. metal because of the air ,trappeditherein a parent that, in theabsence of the metal layer.

Hi, there would be an annular air space or chainber between the sleeve 5and the shaft 6, which would preclude the transferencenof heat. "Inthis'connection, it must be understood that thisannular space isinitially provided in order that the entire inner surface of the sleeveneed not be fitted as by grinding to the shaft- -a'laborious andexpensive job. It is suflicient that thesleeve contact the shaft only ateach end and the inQ- termediate portion of the sleeve be simplyronghcast to provide an annular space.

However, in accordance with the present invention, the metal layer 18,as well as the metal in the annular recess Ill and in the keyways ll,serve not only to provide a rigid lock between the shaft and the runner,but also to offer an easy path for the excess heat to flow from thesleeve 5 into the shaft which is at lower temperature. Thus, thetemperature of the sleeve is kept below that at which it would bulge orin any other manner depart from its proper rectilinear shape, eventhough subjected to longitudinal stress.

It willbe understood that [desire to .compre hend within my inventionsuch modifications as come within the scope of the claims and theinvention. I

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent is: v w

1. In combination in a pump runner assembly, a runner provided with ahub having therein a threaded socket with an annular recess at the outerend of the socket and a plurality-of spaced keyways in the wall of thesocket extending inward from said recess, a drive shaft having its innerend threaded and screwed into the socket and having a keyway adjacentits threaded end extending past the annular recess and along the keywaysin thewall of the socket, a shoulder on the shaft remote from the end ofthe hub, a sleeve on the shaft clamped thereby between the shoulder andthe'end of the hub, a pouring passage being provided between the shaftand sleeve extending from the shoulder to the annular recess, and afusible locking metal filling the passage, the annular recess and said.keyways.

2. In combination in a pump runner assembly, a runner provided with ahub having therein a threaded socket with an annular recess at the outerend of the socket anda plurality of spaced keyways in the wall of thesocket extending inward from said recess, a drive shaft having its innerend threaded and screwed into-:the socket and having a keyway adjacentits threaded end extending past the annular recess and along the keywaysin the wall of the socket, a shoulder on the shaft remote from the endof the hub, a sleeve on the shaft clamped thereby between the shoulderand the end of the hub, and having its inner surface spaced away fromthe surface of the shaft except at the ends of the sleeve where thewalls of the sleeve have a loose running fit on the shaft, the inner oneof such points of running fit lying opposite the keyway in the shaft, apouring keyway in the shaft at said shoulder extending past the outerone of the points of running fit, and a fusible locking metal fillingthe space between the sleeve and the shaft, the annular recess and saidkeyways.

3. In combination in a pump runner assembly, a runner provided with ahub having therein a threadedsocket with an annular recess at the outerend of the socket and a plurality of spaced keyways in the wall of thesocket ex- .tending inward from. said recess, a drive shaft having itsinner and threaded and screwed into the, socket and having a keywayadjacent its "threaded end extending past the annular recess and alongthe keyways in the wall of the socket, a shoulder on the shaft remotefrom the end of the hub, a sleeve on the shaft clamped thereby betweenthe shoulder and the end of the hub, and having its inner surface spacedaway from the surface of the shaft except at the ends of the sleevewhere the walls of the sleeve have a looserunningfit on the shaft, theinner one of such points of running fit lying opposite the keyway in theshaft, 9. pouring keyway in the shaft at said shoulder extending pastthe outer one of the points; of .running fit, a venting keyway in theshaft at said shoulder opposite to the pouring keyway also extendingpast the outer one of the points of. runningfit and a fusible lockingmetal filling the space between the sleeve and the shaft, the annularrecess and the keyways.

4. In combination in a pump runner assembly, a runner provided with ahub having therein a threaded socket with an annular recess at the outerend of the socket and a plurality of spaced keyways in the wall of thesocket extending inward from said recess, a drive shaft having its innerend threaded and screwed into the socket andhaving a keyway adjacent itsthreaded end extending past the annular recess and along the keyways inthe wall of the socket, a shoulder on the shaft remote from the end ofthehub, a sleeve on the shaft clamped thereby between the shoulder andthe end of the hub, a pouring passage being provided between the shaftand sleeve extending from the shoulder to the. annular recess, and afusible locking metal filling the passage, the annular recess and saidkeyways, the spacing and width of said keyways being such that in allpositions of rotation of socket and provided with a keyway at itsthreaded I end which extends across the annular recess in parallel withsaid first keyways and registering with at least one of them, a shoulderon the shaft remote from the end of the runner hub,

a sleeve surrounding the shaft and clamped between the shoulderand theend of the hub when the shaft is screwed into its socket in the filler,a pouring inlet for the annular recess and key- =ways extending fromsaid shoulder longitudinally between the shaft and sleeve to said keywayin the shaft, and a locking body of fusible metal filling said inlet,the annular recess and the keyways.

6. In combination in apump runner assembly, a runner having a hub and arecess therein, a

filler in the recess having a threaded socket with an annular recess atits outer end and a set of keyways extending inward from such recess inspaced relation, a drive shaft threaded into said socket and providedwith a keyway at its threaded end which extends across the annularrecess in parallel with said first keyways and registering with at leastone of them, a shoulder on the shaft remote from the end of the runnerhub, a sleeve surrounding the shaft and clamped between the shoulder andthe end of the hub when the shaft is screwed into its socket in thefiller, the inner surface of the sleeve being spaced away from the shaftproviding an annular space which communicates with said keyway in theshaft, a pouring inlet for said space at the outer end of the sleeve,and a locking body of fusible metal fitting said space and also theannular recess and keyways which are in communication therewith.

'7. In combination, a pump runner assembly including a runner and ashaft, fusible means for securing the runner to the shaft, a sleeveseparate from the runner but abutting therewith and surrounding theshaft leaving an annular space between the sleeve and the shaft, andmeans including a fusible metal filling said annular space for securingsaid sleeve to the shaft.

8. In combination, a pump runner assembly including a runner providedwith a hollow hub adapted to receive the end of a drive shaft, a sleevesurrounding said shaft and bearing against the shaft at a plurality ofpositions leaving an annular space between said positions, and meansconsisting of heat-conducting material for securing the shaft to thesleeve, also to the hub and for filling said space.

9. In combination, a piunp runner assembly including a runner providedwith a hollow hub adapted to receive the end of a drive shaft, saidshaft having a shoulder remote from the hub, a sleeve surrounding saidshaft and positioned between the shoulder and the hub, said sleeve beingspaced from the shaft except in a limited number of places where ittouches the shaft, and means positioned in the space between the sleeveand the shaft for conducting heat from the sleeve to the shaft, saidmeans consisting of heat-conducting material which also serves to securethe shaft to the hub.

10. In combination, a pump runner assembly including a runner prov dedwith a hollow hub adapted to receive the end of a drive shaft, saidshaft having a shoulder remote from the hub, a sleeve surrounding saidshaft and positioned between the shoulder and the hub, said sleeve beingspaced for practically its entire length from said shaft, and meansconsisting of heatconducting material positioned in the space betweenthe sleeve and the shaft for conducting heat from the sleeve to theshaft, said heatconducting material also constituting means for securingthe shaft to the hub.

11. In combination, a pump runner assembly including a runner and ashaft, a sleeve surrounding the shaft and bearing against the shaft in alimited number of positions leaving an annular space at the remainingpositions, and means for draining excess heat from. said sleeve and forsecuring said shaft to the runner and to the sleeve, said meansconsisting of a layer of metal contained within said space and betweenthe shaft and the runner.

12. In combination, a pump runner assembly including a runner providedwith a hub having a threaded opening, a drive shaft having its inner endthreaded and screwed into said opening, said shaft having a shoulderremote from the hub, a sleeve surrounding the shaft and positionedbetween said shoulder and the hub whereby when the shaft is screwed intothe hub, the sleeve is subjected to longitudinal stress by compressionbetween said shoulder and said hub, said sleeve being fitted tightlyabout the shaft except for an annular space between the regions ofcontact, and means including metal contained in said space forpreventing the sleeve from bulging due to said stress and accompanyingheat whereby excessive heat is conducted from the sleeve through saidmetal to the shaft.

13. In combination, in a pump runner assembly, a runner provided with ahub having therein a threaded socket with an annular recess at the outerend of the socket and a plurality of spaced keyways in the wall of thesocket extending inward from said recess, a drive shaft having its innerend threaded and screwed into the socket and having a keyway adjacentits threaded end extending past the annular recess and along the keywaysin the wall of the socket, a shoulder on the shaft remote from the endof the hub, a sleeve on the shaft clamped thereby between the shoulderand the end of the hub, a pouring passage being provided between theshaft and sleeve extending from the shoulder to the annular recess, anda fusible heat-conducting material filling the passage, the annularrecess and said keyways whereby the shaft is locked to the hub andexcess heat is conducted away from the sleeve to said shaft.

OYSTEIN JACOBSEN.

